Question

-- Constraints for table `variation`
--
ALTER TABLE `variation`
  ADD FOREIGN KEY (`parent`) REFERENCES `variation` (`id`),
  ADD FOREIGN KEY (`scale`) REFERENCES `scale` (`id`),
  ADD FOREIGN KEY (`user`) REFERENCES `users` (`user_id`);

--

错误

ERROR 1452（23000）第277行：无法添加或更新子行：a 外键约束失败（getsy。#sql-f44_2a，CONSTRAINT #sql-f44_2a_ibfk_2外键（scale）参考scale（id））

此表变体

CREATE TABLE IF NOT EXISTS `variation` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `parent` bigint(20) DEFAULT NULL,
  `scale` bigint(20) DEFAULT NULL,
  `value` varchar(255) NOT NULL,
  `user` bigint(20) DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `parent` (`parent`,`scale`,`value`,`user`),
  KEY `scale` (`scale`),
  KEY `user` (`user`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=101 ;

帮帮我......

感谢

Answer 1

variation表格列scale中的内容似乎包含表scale列id中缺少的值。

您可以使用以下查询检查缺失值：

SELECT DISTINCT a.scale FROM 
   variation AS a LEFT JOIN scale AS b ON a.scale = b.id 
WHERE b.id IS NULL;

错误上传db到mysql

1 个答案: